<template>
  <div class="article-list">
    <div class="article-list__header">
      <div class="title">
        <section-title name="文章列表" />
      </div>

      <div class="operation">
        <el-button type="primary" icon="el-icon-plus" @click="handleAdd"
          >新增文章</el-button
        >
        <el-button type="danger" icon="el-icon-minus" @click="handleDelete"
          >批量删除</el-button
        >
        <export-excel
          file-name="文章数据表"
          :header="['序号', '作者', '创建时间', '标题', '类型', '阅读数']"
          :filter-filed="[
            'index',
            'author',
            'createDate',
            'name',
            'type',
            'browseNum'
          ]"
          :data="articleList"
        >
          导出表格
        </export-excel>
      </div>
    </div>

    <el-form :inline="true" :model="queryCondition">
      <el-form-item label="标题:">
        <el-input
          v-model="queryCondition.name"
          placeholder="请输入文章标题关键字"
          clearable
        ></el-input>
      </el-form-item>
      <el-form-item label="作者:">
        <el-select
          v-model="queryCondition.author"
          placeholder="请输入作者姓名关键字"
          filterable
          remote
          :remote-method="getRemoteUserList"
          default-first-option
          :loading="userLoading"
        >
          <el-option
            v-for="(item, index) in userListOptions"
            :key="item + index"
            :label="item"
            :value="item"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="类型:">
        <el-select
          v-model="queryCondition.type"
          placeholder="请选择文章类型"
          filterable
          multiple
          clearable
        >
          <el-option
            v-for="item in tableMng.getTable('article')"
            :key="item.id"
            :label="item.name"
            :value="item.id"
          />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" @click="getArticleList">
          查询
        </el-button>
      </el-form-item>
    </el-form>

    <div class="article-list__table">
      <el-table
        :data="articleList"
        border
        highlight-current-row
        v-loading="articleTableLoading"
        @selection-change="handleSelectedRows"
      >
        <el-table-column type="selection" width="50"></el-table-column>
        <el-table-column
          prop="index"
          label="序号"
          width="80px"
        ></el-table-column>
        <el-table-column prop="name" label="标题"></el-table-column>
        <el-table-column
          prop="author"
          label="作者"
          width="120px"
        ></el-table-column>
        <el-table-column prop="type" label="类型" width="120px">
          <template slot-scope="scope">
            <span>{{ tableMng.getNameById('article', scope.row.type) }}</span>
          </template>
        </el-table-column>
        <el-table-column
          prop="browseNum"
          label="阅读数"
          sortable
          width="100px"
        ></el-table-column>
        <el-table-column
          prop="createDate"
          label="创建时间"
          sortable
          width="180px"
        ></el-table-column>
        <el-table-column label="操作" width="120px">
          <template slot-scope="scope">
            <router-link
              :to="`/article/edit/${scope.row.id}/${scope.row.index}`"
            >
              <el-button type="text">编辑</el-button>
            </router-link>
            <el-divider direction="vertical"></el-divider>
            <el-button
              type="text"
              @click="handleDelete(scope.$index, scope.row)"
            >
              删除
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </div>
    <pagination
      :total="total"
      :page-number.sync="queryCondition.pageNumber"
      :page-size.sync="queryCondition.pageSize"
      @pagination="getArticleList"
    />
  </div>
</template>

<script>
import api from '@/api'
import { scroll } from '@/utils/core'
import tableMng from '@/utils/tableMng'
import SectionTitle from '@/components/business/section-title'
import ExportExcel from '@/components/business/excel/export-excel'
import Pagination from '@/components/base/pagination'

export default {
  name: 'ArticleList',
  components: {
    SectionTitle,
    ExportExcel,
    Pagination
  },
  data() {
    return {
      tableMng,
      userListOptions: [],
      userLoading: false,
      articleList: [],
      articleTableLoading: false,
      queryCondition: {
        name: '',
        author: '',
        type: [],
        pageNumber: 1,
        pageSize: 20
      },
      total: 0,
      selectedRows: []
    }
  },
  created() {
    this.getArticleList()
  },
  methods: {
    // 获取文章列表
    async getArticleList() {
      this.articleTableLoading = true
      const data = await api.article.getList({
        ...this.queryCondition,
        type: this.queryCondition.type.toString()
      })
      this.articleList = data.list.map((item, index) => {
        return {
          id: item.id,
          index:
            (this.queryCondition.pageNumber - 1) *
              this.queryCondition.pageSize +
            index +
            1,
          author: item.author,
          createDate: item.createDate,
          name: item.name,
          type: item.type,
          browseNum: item.browseNum
        }
      })
      this.total = data.total
      this.articleTableLoading = false
      const scrollElement = document.querySelector('.inner-layout__page')
      scroll(scrollElement, 0, 800)
    },
    // 跳转到新建文章页面
    handleAdd() {
      this.$router.push('/article/add')
    },
    // 删除
    handleDelete(index, row) {
      let id = []
      let name = []
      if (row) {
        id = [row.id]
        name = [row.name]
      } else {
        id = this.selectedRows.map((row) => row.id)
        name = this.selectedRows.map((row) => row.name)
      }
      if (name.length === 0) {
        this.$message.warning('请选择要删除的文章！')
      } else {
        this.$confirm(`确定删除文章：“${name.join('，')}”？`, '提示', {
          type: 'warning'
        })
          .then(async () => {
            await api.article.remove({ id })
            this.$message.success('删除成功！')
            this.getArticleList()
          })
          .catch(() => {})
      }
    },
    // 多选
    handleSelectedRows(rows) {
      this.selectedRows = rows
    },
    async getRemoteUserList(keyword) {
      this.userLoading = true
      const data = await api.user.getList({ name: keyword })
      this.userListOptions = data.list.map((item) => item.name)
      this.userLoading = false
    }
  }
}
</script>

<style lang="scss" scoped>
.article-list {
  background-color: #fff;
  padding: 1em;

  .article-list__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;

    .title,
    .operation {
      margin-bottom: 1em;
    }
  }

  .article-list__table {
    margin-bottom: 1em;
  }
}
</style>
